I actually saw Trial of the Chicago 7 in theater just before they got closed again. Enjoyable movie, but nothing amazing. Sasha Baron Cohen is indeed very good in it.
Some of my friends have seen Mank and Promising Young Woman and liked them, so I heard of them, but I have seen neither. Pretty curious about them all though. Especially Sound of Metal and Nomadland (the previous film by Chloé Zhao was the very very good The Rider). Also Minari : a korean language american film ? You don't see that every day !
I have seen exceptionally few movies in 2020 (just shy of 70 compared to around 300 usually) and the ones that stand out have not been 2020 movies.... The best I can do is Dwellings in the Fuchun Mountains. It's a quiet, unusually long family portrait with several moments of pure cinematographic bravado, but it's a 2019 film. I guess Portrait of a Lady on Fire is 2020 for the US ? It was nominated for best foreign language film at the Golden Globes last year though.